[Paraview] Do anyone have examples of writing binary file with mesh and results data?

[Petr Krysl]

Paul,

This is a good guess. I have played with this already and Paraview would
read the points okay (for big ended write), but it would crash when reading
the cell data:

…
for k=1:length(Connectivity)
        f=Connectivity{k};
        ctype=zeros(size(f, 1),1)+Cell_types{k};
        fprintf(fid,'CELLS %d %d\n',size(f,1),(size(f,1)*(size(f,2)+1)));%
        if (~binary)
            for i= 1:size(f, 1)
                fprintf(fid,'%d ',size(f,2));
                for j= 1: size(f,2)
                    fprintf(fid,'%d ',f(i,j)-1);
                end
                fprintf(fid,'\n');
            end
        else

fwrite(fid,cast([zeros(size(f,1),1)+size(f,2),f-1],'int32'),'int32','b');
        end
        fprintf(fid,'\n');
        fprintf(fid,'\n');
        fprintf(fid,'CELL_TYPES %d\n',size(f,1));%
        if (~binary)
            for i= 1:size(f, 1)
                fprintf(fid,'%d\n',ctype(i));
            end
        else
            fwrite(fid,cast(ctype,'int32'),'int32','b');
        end
        fprintf(fid,'\n');
        fprintf(fid,'\n');
    end
…

There is something wrong in the code above (or there's a bug in paraview).
 By the way my Matlab code that writes out binary *structured_grid* data
works just fine with paraview.
It is just the unstructured grid that's giving me headaches.

Petr

On Sun, Jul 29, 2012 at 8:29 PM, Paul McIntosh <
paul.mcintosh at internetscooter.com> wrote:

> **
> Maybe check the endianess - to read a binary file that was generated in
> MATLAB I had to change the endianess. I think there is a VTK util on the
> MATHWORKS site but I haven't tried that.
>
> Paul
>
>  ------------------------------
> *From:* paraview-bounces at paraview.org [mailto:
> paraview-bounces at paraview.org] *On Behalf Of *Petr Krysl
> *Sent:* Saturday, 28 July 2012 1:37 AM
> *To:* paraview at paraview.org
> *Subject:* Re: [Paraview] Do anyone have examples of writing binary file
> with mesh and results data?
>
> Hi,
>
> Did you ever get the Matlab writing of the binary VTK files to work?  I'm
> having problems with them too: PV crashes when reading the binary files.
>
> Thanks,
> --
> Petr Krysl
> University of California, San Diego
> Skype: Petr.Krysl.UCSD.EDU
> http://hogwarts.ucsd.edu/~pkrysl/
>
>


-- 
Petr Krysl
University of California, San Diego
Skype: Petr.Krysl.UCSD.EDU
http://hogwarts.ucsd.edu/~pkrysl/
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